<IfModule mod_proxy.c>
  # To enable a cache of proxied content, uncomment the following lines.
  # See http://httpd.apache.org/docs/2.2/mod/mod_cache.html for more details.
  <IfModule mod_disk_cache.c>
     CacheEnable disk /
     CacheRoot "<%= cache_root %>"
  </IfModule>
</IfModule>
